Upgrade time !

[RDNanoGuy]

In your tanks case you pump requirements will look something like this:

125g display x 5 turnover per hour = 625gph

625gph x 20% for refuge = 750gph

You should therefore look for a pump that will provide 750gph @ whatever vertical distance is from the pump to the display return nozzle.

Also don't be afraid to use a slightly oversize pump maybe. 20% larger and use a ball valve on the output. This can be advantageous in 3 ways:

1. You can dial in the perfect flow, which is helpful in quieting noisy overflows.
2. You can use the excess capacity later to run other accessories like carbon and phosban reactors thereby saving the price of another pump.
3. Restricted pumps run more efficiently and use less. Electricity.